Unit 3
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What is polyculture
Different crop types planted all year
What type of agriculture does slash and burn
Traditional agriculture
What are subsidies
Tax to farmers
What type of agriculture is monocultural
Plantation agriculture
Organic agriculture uses:
No pesticides or fertilizers Animals eat organic
What is a CAFO
Contained animal feeding operation
Green Revolution def
A time when farming practices switched in order to produce more food for an increasing population
Soil def
Mix of geologic and organic components
Humus def
Decomposed organic material Has lots of nutrients
What are the layers of soil
O A B C
What is the O soil layer
All organic material Decomposed leaves/plants
What is the A soil layer
Topsoil Minerals from below with organic material Where roots are
What is the B soil layer
Subsoil High in minerals but low in organic material Clay
What is the C soil layer
Weathered bedrock
What differentiates soil texture
Particle sizes
Soils with the biggest particles to smallest particles
Sand- biggest Silt Clay- smallest
Smaller particles = ______ porosity
Higher
Smaller particles = ______ permeability
Lower
Photosynthesis reactants
CO2, H2O, and sun energy
Photosynthesis products
O2 and glucose
Cellular respiration reactants
O2 and glucose
Cellular respiration products
CO2, H20, energy- ATP
Where is most of the carbon on earth
Ocean
Where is most of the nitrogen on earth
Atmosphere